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Effect of three different jaw positions on postural stability during standing
Functional Neurology
|September 3, 2015
Summary
Jaw clenching significantly improves postural stability in healthy adults, even on unstable surfaces. This finding highlights the jaw sensory-motor system's role in balance and has implications for rehabilitation.
Area of Science:
- Neuroscience
- Biomechanics
- Motor Control
Background:
- The jaw and neck regions exhibit anatomical, biomechanical, and neurological connections.
- Neck sensory-motor system information is crucial for maintaining posture.
- Voluntary jaw clenching can enhance muscle strength and motor task performance.
Purpose of the Study:
- To investigate the effect of jaw sensory-motor system activation on postural stability.
- To determine if jaw clenching modulates center of gravity (COG) velocity during quiet standing.
- To assess postural responses under varying jaw positions and visual conditions.
Main Methods:
- 116 healthy subjects participated in the study.
- Center of gravity (COG) velocity was measured during quiet standing on a foam surface.
- Three jaw positions were tested: resting, open, and clenching, with eyes open and closed.
Main Results:
- Jaw clenching significantly reduced COG velocity compared to resting and open jaw positions (p<0.0001).
- This effect was observed regardless of visual input (eyes open or closed).
- The jaw sensory-motor system demonstrated a clear modulatory effect on postural mechanisms.
Conclusions:
- Jaw clenching enhances postural stability in healthy adults, particularly on unstable surfaces.
- The jaw sensory-motor system plays a significant role in modulating posture.
- Findings suggest incorporating jaw clenching into rehabilitation strategies for individuals with postural instability.
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